Effect of Dent Depth in Ultrasonic Spot Welding Joints used Extruded Mg96Zn2Y2 Alloys
Effect of Dent Depth in Ultrasonic Spot Welding Joints used Extruded Mg96Zn2Y2 Alloys
复制标题
凹痕深度对挤压 Mg96Zn2Y2 合金超声波点焊接头的影响
DOI：
10.14723/tmrsj.45.121
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
C. Iwamoto
中科院分区：
文献类型：
--
作者：
Yuichi Higashi;Kazuto Futawatari;C. Iwamoto
推导并证明了一种基于几何特征的表面位点识别算法。定量地定义了原子周围的开放空间S，并用立体角表示。经验法则是，当考虑表面上的台阶时，每个原子周围的开放空间的立体角远大于2π，对于平台原子约为2π，对于台阶脚下的表面原子略大于π，而对于亚表面原子远小于π。S > 0.75π sr似乎是一个合理的表面位置的标准。这种类型的表面原子识别将加速表面缺陷的分析，并有助于例如催化剂设计。
An algorithm to identify surface sites based on geometry was derived and demonstrated. The open space around an atom, S, was quantitatively defined and expressed as a solid angle. A rule of thumb is that the solid angle of open space around each atom is much larger than 2π for a step edge atom when considering steps on a surface, roughly 2π for a terrace atom, slightly larger than π for a surface atom at the foot of a step, and much smaller than π for a subsurface atom. S > 0.75π sr appears to be a reasonable criterion for a surface site. This type of surface atom identification would accelerate analysis of surface defects and contribute, for example, to catalyst design.